/* ============================================================
   CALMUREVIA.COM — HEADER.CSS
   Fixed glassmorphism top navigation
   ============================================================ */

/* ── Header Shell ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 9000;
  transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: rgba(6, 13, 24, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--color-border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.site-header:not(.scrolled) {
  background: rgba(6, 13, 24, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* ── Header Inner ── */
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding-inline: var(--space-xl);
  max-width: var(--container-max);
  margin-inline: auto;
  gap: var(--space-xl);
}

/* ── Logo ── */
.header__logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  flex-shrink: 0;
  transition: opacity var(--transition-base);
}

.header__logo:hover {
  opacity: 0.85;
  color: inherit;
}

.header__logo-img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  object-fit: cover;
}

.header__logo-text {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-white);
  line-height: 1;
  letter-spacing: -0.01em;
}

.header__logo-text span {
  color: var(--color-teal);
}

/* ── Main Nav ── */
.header__nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex: 1;
  justify-content: center;
}

.nav-link {
  position: relative;
  padding: 0.45rem 0.9rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color var(--transition-base), background var(--transition-base);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  right: 50%;
  height: 2px;
  background: var(--gradient-teal);
  border-radius: var(--radius-full);
  transition: left var(--transition-base), right var(--transition-base);
}

.nav-link:hover {
  color: var(--color-white);
  background: rgba(14, 207, 207, 0.06);
}

.nav-link:hover::after {
  left: 0.9rem;
  right: 0.9rem;
}

.nav-link.active {
  color: var(--color-teal);
  background: rgba(14, 207, 207, 0.08);
}

.nav-link.active::after {
  left: 0.9rem;
  right: 0.9rem;
  background: var(--gradient-teal);
}

/* ── Header CTA ── */
.header__cta {
  flex-shrink: 0;
}

.header__cta .btn-primary {
  padding: 0.55rem 1.4rem;
  font-size: 0.85rem;
}

/* ── Hamburger ── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: transparent;
  cursor: pointer;
  transition: background var(--transition-base), border-color var(--transition-base);
  flex-shrink: 0;
}

.hamburger:hover {
  background: var(--color-teal-glow);
  border-color: var(--color-teal);
}

.hamburger__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base), width var(--transition-base);
  transform-origin: center;
}

.hamburger.open .hamburger__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.open .hamburger__bar:nth-child(2) {
  opacity: 0;
  width: 0;
}

.hamburger.open .hamburger__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile Menu Overlay ── */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 8900;
  display: flex;
  flex-direction: column;
  background: rgba(6, 13, 24, 0.98);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  padding-top: calc(var(--header-height) + var(--space-xl));
  padding-inline: var(--space-xl);
  padding-bottom: var(--space-xl);
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-menu__nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-2xl);
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  transition: color var(--transition-base), background var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--color-teal);
  background: rgba(14, 207, 207, 0.07);
  border-color: var(--color-border);
  transform: translateX(4px);
}

.mobile-nav-link__icon {
  font-size: 1.2rem;
  width: 28px;
  text-align: center;
}

.mobile-menu__footer {
  margin-top: auto;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.mobile-menu__disclaimer {
  font-size: 0.78rem;
  color: var(--color-text-dim);
  line-height: 1.6;
  text-align: center;
}

.mobile-menu__cta {
  display: block;
  text-align: center;
  margin-bottom: var(--space-xl);
}

/* ── Page offset for fixed header ── */
.page-offset {
  padding-top: var(--header-height);
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .header__nav {
    display: none;
  }

  .header__cta {
    display: none;
  }

  .hamburger {
    display: flex;
  }
}

@media (max-width: 480px) {
  .header__inner {
    padding-inline: var(--space-md);
  }

  .header__logo-text {
    font-size: 1.1rem;
  }
}